Cursor 類別

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

表示用來繪製滑鼠指標的影像。

public ref class Cursor sealed : IDisposable, System::Runtime::Serialization::ISerializable

[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.CursorConverter))]
[System.Serializable]
public sealed class Cursor : IDisposable, System.Runtime.Serialization.ISerializable

[System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.CursorConverter))]
public sealed class Cursor : IDisposable, System.Runtime.Serialization.ISerializable

[<System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.CursorConverter))>]
[<System.Serializable>]
type Cursor = class
    interface IDisposable
    interface ISerializable

[<System.ComponentModel.TypeConverter(typeof(System.Windows.Forms.CursorConverter))>]
type Cursor = class
    interface IDisposable
    interface ISerializable

Public NotInheritable Class Cursor
Implements IDisposable, ISerializable

繼承

Object

Cursor

屬性

TypeConverterAttribute SerializableAttribute

實作

IDisposable ISerializable

範例

下列程式碼範例會顯示一個表單，示範如何使用自訂資料指標。 自訂 Cursor 會內嵌在應用程式的資源檔中。 此範例需要資料指標包含在名為 MyCursor.cur 的資料指標檔案中。 若要使用命令列編譯此範例，請包含下列旗標： /res:MyCursor.Cur, CustomCursor.MyCursor.Cur

using System;
using System.Drawing;
using System.Windows.Forms;

namespace CustomCursor
{
    public class Form1 : System.Windows.Forms.Form
    {
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }

        public Form1()
        {
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Text = "Cursor Example";
            
            // The following generates a cursor from an embedded resource.
            
            // To add a custom cursor, create a bitmap
            //        1. Add a new cursor file to your project: 
            //                Project->Add New Item->General->Cursor File

            // --- To make the custom cursor an embedded resource  ---
            
            // In Visual Studio:
            //        1. Select the cursor file in the Solution Explorer
            //        2. Choose View->Properties.
            //        3. In the properties window switch "Build Action" to "Embedded Resources"

            // On the command line:
            //        Add the following flag:
            //            /res:CursorFileName.cur,Namespace.CursorFileName.cur
            //        
            //        Where "Namespace" is the namespace in which you want to use the cursor
            //        and   "CursorFileName.cur" is the cursor filename.

            // The following line uses the namespace from the passed-in type
            // and looks for CustomCursor.MyCursor.Cur in the assemblies manifest.
        // NOTE: The cursor name is acase sensitive.
            this.Cursor = new Cursor(GetType(), "MyCursor.cur");  
        }
    }
}

Imports System.Drawing
Imports System.Windows.Forms

Namespace CustomCursor
   
   Public Class Form1
      Inherits System.Windows.Forms.Form
      
      <System.STAThread()> _
      Public Shared Sub Main()
         System.Windows.Forms.Application.Run(New Form1())
      End Sub

      Public Sub New()

         Me.ClientSize = New System.Drawing.Size(292, 266)
         Me.Text = "Cursor Example"
         
        ' The following generates a cursor from an embedded resource.
         
        'To add a custom cursor, create a bitmap
        '       1. Add a new cursor file to your project: 
        '               Project->Add New Item->General->Cursor File

        '--- To make the custom cursor an embedded resource  ---

        'In Visual Studio:
        '       1. Select the cursor file in the Solution Explorer
        '       2. Choose View->Properties.
        '       3. In the properties window switch "Build Action" to "Embedded Resources"

        'On the command line:
        '       Add the following flag:
        '           /res:CursorFileName.cur,Namespace.CursorFileName.cur

        '       Where "Namespace" is the namespace in which you want to use the cursor
        '       and   "CursorFileName.cur" is the cursor filename.

        'The following line uses the namespace from the passed-in type
        'and looks for CustomCursor.MyCursor.cur in the assemblies manifest.
        'NOTE: The cursor name is acase sensitive.
        Me.Cursor = New Cursor(Me.GetType(), "MyCursor.cur")
      End Sub
   End Class
End Namespace 'CustomCursor

下列程式碼範例會在 控制項中 TreeView 顯示客戶資訊。 根樹狀節點會顯示客戶名稱，子樹狀節點會顯示指派給每位客戶的訂單編號。 在此範例中，1，000 個客戶會分別顯示 15 個訂單。 的重 TreeView 繪會使用 BeginUpdate 和 EndUpdate 方法隱藏，而且會在建立和繪製 TreeNode 物件時 TreeView 顯示等候 Cursor 。 此範例會要求您在應用程式目錄中有名為 MyWait.cur 的資料指標檔案。 它也需要 Customer 可以保存 物件集合的物件 Order ，而且您已在 上 Form 建立 控制項的 TreeView 實例。

// The basic Customer class.
ref class Customer: public System::Object
{
private:
   String^ custName;

protected:
   ArrayList^ custOrders;

public:
   Customer( String^ customername )
   {
      custName = "";
      custOrders = gcnew ArrayList;
      this->custName = customername;
   }


   property String^ CustomerName 
   {
      String^ get()
      {
         return this->custName;
      }

      void set( String^ value )
      {
         this->custName = value;
      }

   }

   property ArrayList^ CustomerOrders 
   {
      ArrayList^ get()
      {
         return this->custOrders;
      }

   }

};


// End Customer class
// The basic customer Order class.
ref class Order: public System::Object
{
private:
   String^ ordID;

public:
   Order( String^ orderid )
   {
      ordID = "";
      this->ordID = orderid;
   }


   property String^ OrderID 
   {
      String^ get()
      {
         return this->ordID;
      }

      void set( String^ value )
      {
         this->ordID = value;
      }

   }

};
// End Order class



void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for ( int x = 0; x < 1000; x++ )
   {
      customerArray->Add( gcnew Customer( "Customer " + x ) );
   }
   
   // Add orders to each Customer object in the ArrayList.
   IEnumerator^ myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer1 = safe_cast<Customer^>(myEnum->Current);
      for ( int y = 0; y < 15; y++ )
      {
         customer1->CustomerOrders->Add( gcnew Order( "Order " + y ) );
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   ::Cursor::Current = gcnew System::Windows::Forms::Cursor( "MyWait.cur" );
   
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1->BeginUpdate();
   
   // Clear the TreeView each time the method is called.
   treeView1->Nodes->Clear();
   
   // Add a root TreeNode for each Customer object in the ArrayList.
   myEnum = customerArray->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Customer^ customer2 = safe_cast<Customer^>(myEnum->Current);
      treeView1->Nodes->Add( gcnew TreeNode( customer2->CustomerName ) );
      
      // Add a child treenode for each Order object in the current Customer object.
      IEnumerator^ myEnum = customer2->CustomerOrders->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Order^ order1 = safe_cast<Order^>(myEnum->Current);
         treeView1->Nodes[ customerArray->IndexOf( customer2 ) ]->Nodes->Add( gcnew TreeNode( customer2->CustomerName + "." + order1->OrderID ) );
      }
   }
   
   // Reset the cursor to the default for all controls.
   ::Cursor::Current = Cursors::Default;
   
   // Begin repainting the TreeView.
   treeView1->EndUpdate();
}

// The basic Customer class.
public class Customer : System.Object
{
   private string custName = "";
   protected ArrayList custOrders = new ArrayList();

   public Customer(string customername)
   {
      this.custName = customername;
   }

   public string CustomerName
   {      
      get{return this.custName;}
      set{this.custName = value;}
   }

   public ArrayList CustomerOrders 
   {
      get{return this.custOrders;}
   }
} // End Customer class 

// The basic customer Order class.
public class Order : System.Object
{
   private string ordID = "";

   public Order(string orderid)
   {
      this.ordID = orderid;
   }

   public string OrderID
   {      
      get{return this.ordID;}
      set{this.ordID = value;}
   }
} // End Order class

// Create a new ArrayList to hold the Customer objects.
private ArrayList customerArray = new ArrayList(); 

private void FillMyTreeView()
{
   // Add customers to the ArrayList of Customer objects.
   for(int x=0; x<1000; x++)
   {
      customerArray.Add(new Customer("Customer" + x.ToString()));
   }

   // Add orders to each Customer object in the ArrayList.
   foreach(Customer customer1 in customerArray)
   {
      for(int y=0; y<15; y++)
      {
         customer1.CustomerOrders.Add(new Order("Order" + y.ToString()));    
      }
   }

   // Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = new Cursor("MyWait.cur");
        
   // Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate();

   // Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear();

   // Add a root TreeNode for each Customer object in the ArrayList.
   foreach(Customer customer2 in customerArray)
   {
      treeView1.Nodes.Add(new TreeNode(customer2.CustomerName));
          
      // Add a child treenode for each Order object in the current Customer object.
      foreach(Order order1 in customer2.CustomerOrders)
      {
         treeView1.Nodes[customerArray.IndexOf(customer2)].Nodes.Add(
           new TreeNode(customer2.CustomerName + "." + order1.OrderID));
      }
   }

   // Reset the cursor to the default for all controls.
   Cursor.Current = Cursors.Default;

   // Begin repainting the TreeView.
   treeView1.EndUpdate();
}

Public Class Customer
   Inherits [Object]
   Private custName As String = ""
   Friend custOrders As New ArrayList()

   Public Sub New(ByVal customername As String)
      Me.custName = customername
   End Sub

   Public Property CustomerName() As String
      Get
         Return Me.custName
      End Get
      Set(ByVal Value As String)
         Me.custName = Value
      End Set
   End Property

   Public ReadOnly Property CustomerOrders() As ArrayList
      Get
         Return Me.custOrders
      End Get
   End Property
End Class


Public Class Order
   Inherits [Object]
   Private ordID As String

   Public Sub New(ByVal orderid As String)
      Me.ordID = orderid
   End Sub

   Public Property OrderID() As String
      Get
         Return Me.ordID
      End Get
      Set(ByVal Value As String)
         Me.ordID = Value
      End Set
   End Property
End Class

' Create a new ArrayList to hold the Customer objects.
Private customerArray As New ArrayList()

Private Sub FillMyTreeView()
   ' Add customers to the ArrayList of Customer objects.
   Dim x As Integer
   For x = 0 To 999
      customerArray.Add(New Customer("Customer" + x.ToString()))
   Next x

   ' Add orders to each Customer object in the ArrayList.
   Dim customer1 As Customer
   For Each customer1 In customerArray
      Dim y As Integer
      For y = 0 To 14
         customer1.CustomerOrders.Add(New Order("Order" + y.ToString()))
      Next y
   Next customer1

   ' Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = New Cursor("MyWait.cur")

   ' Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate()

   ' Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear()

   ' Add a root TreeNode for each Customer object in the ArrayList.
   Dim customer2 As Customer
   For Each customer2 In customerArray
      treeView1.Nodes.Add(New TreeNode(customer2.CustomerName))

      ' Add a child TreeNode for each Order object in the current Customer object.
      Dim order1 As Order
      For Each order1 In customer2.CustomerOrders
         treeView1.Nodes(customerArray.IndexOf(customer2)).Nodes.Add( _
    New TreeNode(customer2.CustomerName + "." + order1.OrderID))
      Next order1
   Next customer2

   ' Reset the cursor to the default for all controls.
   Cursor.Current = System.Windows.Forms.Cursors.Default

   ' Begin repainting the TreeView.
   treeView1.EndUpdate()
End Sub

備註

游標是小型圖片，其螢幕上的位置是由指向裝置控制，例如滑鼠、手寫筆或曲球。 當使用者移動指向裝置時，作業系統會據以移動游標。

不同的游標圖形可用來通知使用者滑鼠將擁有的作業。 例如，編輯或選取文字時，通常會顯示游標 Cursors.IBeam 。 等候游標通常用來通知使用者進程目前正在執行中。 您可能要求使用者等候的程式範例是開啟檔案、儲存檔案，或填滿控制項，例如 DataGrid ， ListBox 或 TreeView 包含大量資料。

衍生自 Control 類別的所有控制項都有 Cursor 屬性。 若要在控制項的界限內變更滑鼠指標所顯示的游標，請將 指派 Cursor 給 Cursor 控制項的 屬性。 或者，您可以將 指派 Cursor 給 Current 屬性，在應用層級顯示資料指標。 例如，如果應用程式的目的是要編輯文字檔，您可以將 屬性設定 Current 為 Cursors.WaitCursor ，在檔案載入或儲存時顯示應用程式上的等候游標，以防止處理任何滑鼠事件。 當程式完成時，請將 Current 屬性 Cursors.Default 設定為 ，讓應用程式在每個控制項類型上顯示適當的資料指標。

注意

如果您在重設屬性回到 Cursors.Default 游標之前呼叫 Application.DoEvents ，應用程式會繼續接聽滑鼠事件，並繼續顯示應用程式中每個控制項的適當 Cursor 。 Current

資料指標物件可以從數個來源建立，例如現有 Cursor 、標準 Cursor 檔案、資源或資料流程的控制碼。

注意

類別 Cursor 不支援動畫資料指標 (.ani 檔案) 或具有黑白色彩的資料指標。

如果您使用做為游標的影像太小，您可以使用 DrawStretched 方法來強制影像填滿游標的界限。 您可以呼叫 Hide 方法來暫時隱藏資料指標，並藉由呼叫 Show 方法來還原資料指標。

從 .NET Framework 4.5.2 開始，當app.config檔案包含下列專案時， Cursor 將會根據系統 DPI 設定來調整大小：

<appSettings>  
  <add key="EnableWindowsFormsHighDpiAutoResizing" value="true" />  
</appSettings>  

建構函式

Cursor(IntPtr)	從指定的視窗控制代碼，初始化 Cursor 類別的新執行個體。
Cursor(Stream)	從指定的資料流，初始化 Cursor 類別的新執行個體。
Cursor(String)	從指定的檔案，初始化 Cursor 類別的新執行個體。
Cursor(Type, String)	從指定的資源，以指定的資源類型，初始化 Cursor 類別的新執行個體。

屬性

Clip	取得或設定表示游標裁剪方框的範圍。
Current	取得或設定表示滑鼠游標的游標物件。
Handle	取得游標的控制代碼。
HotSpot	取得游標作用點。
Position	取得或設定游標的位置。
Size	取得游標物件的大小。
Tag	取得或設定物件，它包含 Cursor 相關資料。

方法

CopyHandle()	複製這個 Cursor 的控制代碼。
Dispose()	釋放 Cursor 所使用的所有資源。
Draw(Graphics, Rectangle)	在指定的表層和指定的範圍內繪製游標。
DrawStretched(Graphics, Rectangle)	在指定的表層和指定的範圍內，使用延伸格式繪製游標。
Equals(Object)	傳回值，指出這個游標是否等於指定的 Cursor。
Finalize()	允許物件在記憶體回收進行回收之前，嘗試釋放資源並執行其他清除作業。
GetHashCode()	擷取目前 Cursor 的雜湊碼。
GetType()	取得目前執行個體的 Type。 (繼承來源 Object)
Hide()	隱藏游標。
MemberwiseClone()	建立目前 Object 的淺層複製。 (繼承來源 Object)
Show()	顯示游標。
ToString()	擷取表示這個 Cursor 的人類看得懂的字串。

運算子

Equality(Cursor, Cursor)	傳回值，指出 Cursor 類別的兩個執行個體是否相等。
Inequality(Cursor, Cursor)	傳回值，指出 Cursor 類別的兩個執行個體是否不相等。

明確介面實作

ISerializable.GetObjectData(SerializationInfo, StreamingContext)

序列化物件。

另請參閱

• Cursors